Collapsible core for concrete culverts.



A. E. CAMBLIN. COLLAPSIBLE CORE FOR CONCRETE CULVERTS,

APPLICATION FILED JUNE 4,1915. I

Patented Feb. 8,1916.

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v A. E. CAMBLIN.- COLLAPSIBLE CORE FOR CONGRETE CULVERTS. APPLICATIONHLED JUNEM 1915.

1,171,316, 1 Patented Feb. 8,1916.

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A. E. CAMBLIN. COLLAPSIBLE CORE FOR CONCRETE CUL'VERTS.

APPLICATION FILED JUNE 4, I915.

. Patented. Feb. 8, 1916.

3 SHEETSSHEET 3.

WIT/VESSESQ ATTORNEYS ARTHUR E. CAMBLIN, 0F STELLA, NEBRASKA.

COLLAIPSIBLE CORE FOR CONGRETE. CIlLVERTS.

Specification of Letters Patent.

Patented Feb. 8, 19116.

Application filed June 4, 1915. Serial No. 32,092.

T 0 all whom it may concern:

Be it known that I, ARTHUR E. CAMBLIN, a citizen of the United States,and a resident of Stella, in the county of Richardson and State ofNebraska, have invented certain new and useful Improvements inCollapsible Cores for Concrete Culverts, of which the following is aspecification.

My present invention relates generally to collapsible cores for concreteculverts adapted in use to freely support mold boards upon whichculverts or like structures are erected of concrete or plastic materialsof this nature, my primary object being to provide certain improvementsin devices of this character, with respect to simplicity, reduced cost,and general effectiveness, particularly over my co -pending applicationNumber 715,322, which was filed August 16, 1912, Patent No. 1,142,669,June 8, 1915.

In the accompanying drawings which illustrate my present improvement,Figure 1 is a front elevation of one of my improved forms in operativeposition with mold boards thereon. Fig. 2 is a vertical section takentherethrough substantially on line 22 of Fig. 1. Fig. 3 is a sectionalview through a culvert after formation illustrating one of my improvedforms in collapsed position with the mold boards removed. Fig. 1 is avertical section taken therethrough substantially on line 14l of Fig. 3.Fig. 5 is a vertical section taken through a pair of the supportsillustrating the end connection in the form of links between a series ofthe trip gates. Fig. 6 is a detail perspective view of one of the tripgates. Fig. 7 is a view partly in side elevation and partly in sectionillustrating a slightly modified form of arch member with side wingsadjustably carried thereby. Fig. 8 is a similar view illustratinganother slightly modified form in which differently adjustable sidewings are utilized. Fig. 9 is a detail sectional view taken therethroughsubstantially on line 99 of Fig. 8. Fig. 10 is a detail perspective viewof the drawbar actuating lever. Fig. 11 is a detail section takenthrough the draw bar actuating lever substantially on line 1111 of Fig.10. Fig. 12 is a detail perspective view of the relatively engageableend portions of certain sections of the draw bar.

Referring now generally to these figures, it will be seen that as in myapplication be fore referred to, I provide a collapsible culvert coreconsisting of a plurality of supports for the beveled-edge mold boardsA, each of the supports including an upper rigid arch member to whichcurved side wings are adjustably connected, the upper adjacent ends ofwhich side wings are in use lapped by-means of a top cap, and a lowertrip gate hin'gedly connected to the arch member, the series of tripgates being connected with'one another so that by the use of a suitablelever, or even without the use of such lever, the several trip gateswithin a finished culvert, may be moved on their hinged connections towithdraw the support of the arch members, which the trip gatesconstitute, thus permitting the arch members with their side wings andthe top cap to lower, the connections between the several trip gatesproviding for the subsequent withdrawal .of the trip gates and the archmembers carried thereby from within the finished culvert. i

As seen in Figs. 1 to 6 inclusive, in which a skeleton structure isshown, it'will be seen that the rigid arch member is in the form of asubstantially inverted 'U-shaped strip B, connected by a cross strip, Bbetween its extensions, and provided with a plurality of bearings Binwardly through which project rods C from the side wings C, thebearings having set screws 6 whereby the adjusting rods C may be engagedat selected points to maintain the side wings C suitably spaced from thesides of the arch member B.

The lower extensions of the strip B forming this arch member areprovided with lateral apertured projecting pieces B which receive theextremities of a cross rod D, passing also through similar aperturedprojections E of the trip gate E, so as to form hinged connect-ionsbetween the trip gate E at its opposite ends and the arch member,permitting the trip gate to assume either the vertical operativeposition as shown in Figs. 1 and 2, or the horizontal'inoperativeposition as shown in Figs. 3 and 1, preparatory to the withdrawal of theculvert support.

A longitudinally extending and transversely curved top cap- F connectsthe upper adjacent ends of the two side wings C, and may rest eitherdirectly upon the thus lapped ends of the side wings or upon the moldboards A disposed on the side wings as shown respectively in Figs. 3 and1.

Each of the trip gates E is substantially rectangular in form and ofskeleton structure and, in addition to its end hinge plate E, is mountedupon rollers E which may travel upon beams G forming tracks as clearlyseen in Figs. 1 to 3 inclusive, the ends thereof being further providedwith extending hooks E asbest seen in Figs. 5 and 6, in order to providefor the reception of side links H in the form of eye rods, the hooks Eprojecting from both sides of the trip gate for this purpose. The lowerportion of each of the trip gates is also pro vided with a central slotE and with extending pieces E upon opposite sides of the slot havingrecesses E for the reception of laterally projecting pins I of thesections I of the draw bar utilized either with the connecting eye rodsI-I before mentioned or independent thereof.

As best seen in Figs. 2, 4:, and 12, the sections of the draw bar I areprovided at their ends with laterally offset downturned flanges Iprojecting in relatively opposite directions with respect to adjacentends of the sections, in order that the said sections may be detachablyheld in engagement, the several sections so joined extending through theslots E of the several trip gates E as best seen by reference to Fig. l,with their laterally projecting pins I disposed in the recesses Fl ofthe extensions E of the trip gates, so that with the trip gates in theirvertically operative positions as shown in Figs. 1, 2, and 5, a pullupon the outer end of the draw bar results in movement of the severaltrip gates connected as before described, to horizontal positions asshown in Figs. 3 and 4, such movement resulting in lowering movement ofthe arches and side wings whereby to permit ready withdrawal of the moldboards A and subsequent withdrawal of the several supports including thearches and the trip gates as before described, leaving the finishedculvert.

In order to move the draw bar and effect withdrawal of the severalsupports as just described, a lever such as shown in Fig. 10, may beemployed, this lever J being intermediately pivoted at y' to the ends ofbrackets J extending from a cross piece J", the latter of which mayextend transversely across one finished end of the culvert, as clearlyseen in Fig. i, the lower end of the lever J being laterally oiiset asshown at j and provided with a supplemental piece forming a slot acrosswhich a pin j as best seen in Figs. 10 and 11, is secured, this pinbeing adapted to enter a selected one of the recesses at one end of thedraw bar I which, as plainly seen in Fig. l, is provided with a seriesof such recesses as shown at I the lower end of the lever J straddlingthe draw bar when so engaged. Thus with the parts in this position,inward movement upon the upper handle end of the lever results inlongitudinal outward movement of the draw bar, and consequent loweringmovement of the several arches to their inoperative positions shown inFigs. 3 and 4:;

As shown in Figs. 7 and 8, the rigid arches may be in the form ofsubstantially semi-circular solid members K and K respectively, in whichcase they are connected to the upper portions of the trip gates byhinges K and K the side wings of the member K shown in Fig. 7, andindicated at L, being provided with inwardly extending slotted adjustingarms L, through the slots of which are extended adjusting bolts of thearch member K, these bolts operating to clamp the adjusting arms inselected position.

In Fig. 8 the side wing M is shown as provided adjacent its upper endwith an inwardly projecting arm pivotally connected at m to the upperportion of the arch member, this side wing having a lower inwardlyprojecting arm M provided with a series of apertures m with a selectedone of which a transverse pin 70 of the arch member may be engaged inorder to hold the side wing in adjusted position.

From the foregoing it will be seen tha the supports I have shown for thepurpose described, are capable of ready and easy collapsing movementsand withdrawal from a completed arch, and in view of the wide range ofadjustment of the side wings of the several arch members, connected ineach adjusted position, as they are by means of the top cap F, arches ofone size may be used for molding culverts of considerably increaseddimensions with respect thereto,

so that the necessity of providing diiferent sizes of arch members wherea culvert of increased dimensions is desired, is entirely done awaywith.

The several supports when placed in 0perative position as shown in Figs.1 and 2, are rigidly held by the connections between the several tripgates, and by the mold boards disposed thereon and connecting the same,and yet at the same time may, as before stated, be readily tripped toinoperative position by the use of the lever J or by other meansengageable with the draw bar I or with the outer trip gate of a seriesible supports for mold boards, each of which supports consists of arigid arch member, a pair of side wings having adjustable connectionwith the sides of the arch member for movement toward and away from thesame, a curved top cap connecting the upper adjacent ends of said sidewings and cooperating with the latter to support the mold boards, aroller mounted trip gate beneath and hingedly connected to the archmember, and connections between the several trip gates whereby they maybe simultaneously moved upon the said hinged connections to inoperativepositions.

2. In a culvert form a plurality of collapsible supports for moldboards, each of which supports consists of a rigid arch memher, a pairof curved side wings disposed at the sides of the arch member and havinginwardly projecting adjusting arms, means carried by the arch member foradjustably holding the arms of the side wings whereby to support thelatter in selected positions with respect to the sides of the archmember, a curved top cap connecting the upper adjacent ends of said sidewings and cooperating with the latter to support the mold boards, anadjustable support beneath and hingedly connected to the arch member,and connections between the adjustable supports of the several archmembers whereby they may be simultaneously moved to inoperativepositions.

3. In a culvert core, a plurality of collapsible supports for moldboards, each oi which supports consists of a rigid skeleton arch membercomprising an inverted U- shaped body strip and a connecting crossstrip, the body strip being provided with a plurality of tubularbearings, curved side wings disposed at the sides of the said archmember and having inwardly projecting adjusting rods extending throughthe said bearings, set screws threaded into the bearings and engageablewith the said adjust ing rod to hold the side wings in selectedadjustment with respect to the sides of the arch member, a curved topcap lapping the upper adjacent ends of the side wings to cover the spacetherebetween, an adjustable support for the arch member hingedlyconnected thereto, and connections between the several supports wherebythey may be simultaneously adjusted to inoperative positions for thepurpose described.

45. In a culvert core, a plurality of collapsible supports for moldboards, each of which supports consists of a rigid arch member,adjustable side wings carried by the arch member, a top cap connectingthe upper adjacent ends of the side wings and Copies of this patent maybe obtained for bridging the space therebetween, a substantiallyrectangular trip gate hingedly connected to the lower portion of thearch member and adapted to normally assume a vertical positiontherebeneath in use, rollers carried by the trip gate, tracks upon whichthe rollers are mounted, to permit of ready movement of the trip gate tohorizontal inoperative position, connections between the trip gates ofthe several supports whereby the trip gate may be simultaneously movedto inoperative position, said connections being in the form of a drawbar in sections, means carried by the sections of the draw bar wherebythey may be detachably united in use, and means for actuating the drawbar in order to simultaneously move the several trip gates.

5. In a culvert core, a plurality of collapsible supports for moldboards, each of which consists of a rigid arch member, adjustable. sidewings carried by the arch member, a top cap connecting the upperadjacent ends of the side wings, a trip gate below and hingedlyconnected to the arch member and provided with hook members extending inrelatively opposite directions from the ends thereof, eye rodsengageable vwith the said hook extensions of adjacent trip gates wherebyto connect the same throughout the series of supports and permit oftheir simultaneous movement to inoperative positions, rollers carried bythe said trip gates, and tracks upon which the rollers are disposedwhereby to permit of ready movement of the several trip gates toinoperative positions.

6. In a culvert core, a plurality of collapsible supports for moldboards, each of which supports consists of a rigid arch member,adjustable side wings carried by the arch member, a top cap connectingthe upper adjacent ends of the side wings, a roller mounted trip gatedisposed below and hingedly connected to the arch member and providedwith a lower intermediate slot and with projecting members at oppositesides of the said slot having recesses therein, a draw bar consisting ofa plurality of detachably connected sections having laterally projectingpins :tor engagement in the recesses of the said trip gate extensions,and

a lever engageable with the draw bar whereby to actuate the same andsimultaneously move the several trip gates to inoperative positions.

ARTHUR E. CAMBLIN.

'Witnesses:

' J. R. CAIN,

E. C. ROBERTS.

five cents each, by addressing the Commissioner of Patents, Washington,D. G.

